#nav {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: #ffffff;
  z-index: 999;
}
#app {
  width: 100%;
}
a:hover {
  color: red;
}
li,
a {
  padding: 12px 0px;
  text-decoration: none;
  font-size: 15px;
  color: black;
}

.introduce-title a,
.news-title a {
  font-size: 40px;
}
.content {
  margin-top: 77px;
  width: 100%;
}
.content img {
  width: 100%;
}

.introduce-title,
.news-title {
  margin-bottom: 35px;
  clear: both;
  width: 100%;
}
.introduce-content {
  width: 60%;
  float: left;
}
.Decoration-drawing img {
  width: 40%;
}
.introduce-content p {
  line-height: 50px;
  width: 85%;
  font-size: 17px;
}
.company-video {
  overflow: hidden;
  padding-top: 29px;
  /* mix-blend-mode: screen; */
  width: 40%;
}
.news-ul {
  padding-left: 50px; 
  width: 100%;
}
video {
  height: 100%;
  width: 100%;
  overflow: hidden;
}
.introduce,
.news {
  padding-top: 75px;
  width: 90%;
  padding-left: 5%;
  padding-right: 5%;
}

.news-li {
  border-bottom: 1px solid #7777;
  height: 45px;
  line-height: 0px;
  width: 90%;
  list-style-type: none;
}
.news-li a {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.news-li span {
  padding-top: 30px;
  float: right;
}
.tab-tit {
  font-size: 20px;
  width: 100%;
}
.tab-tit a {
  display: inline-block;
  height: 100%;
  line-height: 40px;
  width: 70%;
  font-size: 20px;
  text-align: left;
  color: #333;
  text-decoration: none;
}
::v-deep .el-tabs__item {
  font-size: 20px;
  margin: 22px 0px;
}
@media screen and (min-width: 1400px) {
  #app,
  #nav {
    /* background-color: skyblue; */
    max-width: 1687px;
    padding: 0px auto;
    margin: 0px auto;
  }
  .Decoration-drawing img {
    width: 40%;
    height: 480px;
    float: left;
  }
}
@media screen  and (max-width: 1400px) and  (min-width:730px) {
  #app {
    /* background-color: red; */
    width: 100%;
  }
  
 
  .introduce-title a,
  .news-title a {
    font-size: 40px;
  }
  .content {
    width: 100%;
  }
  .content img {
    width: 100%;
  }

  .introduce-title,
  .news-title {
    margin-bottom: 35px;
    clear: both;
    width: 100%;
  }
  .introduce-content {
    width: 100%;
    float: left;
  }

  .introduce-content p {
    line-height: 50px;
    width: 100%;
    font-size: 17px;
  }
   .Decoration-drawing img {
    width: 100%;
    height: 100%;
  }
  .company-video {
    overflow: hidden;
    clear: both;
    padding-top: 29px;
    /* mix-blend-mode: screen; */
    width: 100%;
  }
  .news-ul {
    /* mix-blend-mode: screen; */
    width: 100%;
  }
  video {
    height: 100%;
    width: 100%;
    overflow: hidden;
  }
  .introduce,
  .news {
    padding-top: 75px;
    width: 90%;
  }

  .news-li {
    border-bottom: 1px solid #7777;
    height: 45px;
    line-height: 0px;
    width: 90%;
    list-style-type: none;
  }
  .news-li a {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .news-li span {
    padding-top: 30px;
    float: right;
  }
  .tab-tit {
    font-size: 20px;
    width: 100%;
  }
  .tab-tit a {
    display: inline-block;
    height: 100%;
    line-height: 20px;
    width: 70%;
    font-size: 20px;
    text-align: left;
    color: #333;
    text-decoration: none;
  }
}
@media screen  and (max-width: 730px)  {
  #app {
    width: 100%;
  }
 .butt{
  margin-top: 10px;
 }
  .introduce-title a,
  .news-title a {
    font-size: 30px;
  }
  .content {
    width: 100%;
  }
  .content img {
    width: 100%;
    height: 200px;
  }

  .introduce-title,
  .news-title {
    margin-bottom: 35px;
    clear: both;
    width: 100%;
  }
  .introduce-content {
    width: 100%;
    float: left;
  }

  .introduce-content p {
    line-height: 50px;
    width: 100%;
    font-size: 17px;
  }
   .Decoration-drawing img {
    width: 100%;
    height: 100%;
  }
  .company-video {
    overflow: hidden;
    clear: both;
    padding-top: 29px;
    /* mix-blend-mode: screen; */
    width: 100%;
  }
  .news-ul {
    padding-left: 0px; 
    /* mix-blend-mode: screen;  */
    width: 100%;
  }
  video {
    height: 100%;
    width: 100%;
    overflow: hidden;
  }
  .introduce,
  .news {
    padding-top: 40px;
    width: 90%;
  }

  .news-li {
    border-bottom: 1px solid #7777;
    height: 45px;
    line-height: 0px;
    width: 100%;
    list-style-type: none;
  }
  .news-li a {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .news-li span {
    padding-top: 38px;
    float: right;
  }
  .tab-tit {
    font-size: 20px;
    width: 100%;
  }
  .tab-tit a {
    display: inline-block;
    height: 100%;
    line-height: 40px;
    width: 50%;
    font-size: 17px;
    text-align: left;
    color: #333;
    text-decoration: none;
  }
  ::v-deep .el-tabs__item {
    font-size: 18px;
    margin: 25px 0px;
  }
}